[1] Gloucestershire Hlth & Care NHS Fdn Trust, Dept Adult Speech & Language Therapy, Gloucestershire, England
[2] Manchester Metropolitan Univ, Dept Nursing, Manchester, Greater Manches, England
[3] Leeds Beckett Univ, Dept Psychol, Leeds, West Yorkshire, England
[4] Barnsley Hosp NHS Fdn Trust, Barnsley Assist Technol Team, Barnsley, South Yorkshire, England
[5] Univ Sheffield, Sch Hlth & Related Res, Sheffield, England
[6] Manchester Metropolitan Univ, Fac Educ, Manchester, Greater Manches, England
[7] Southmead Hosp, Bristol Speech & Language Therapy Res Unit Steps &, Bristol BS10 5NB, England